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Finding the Fourth Proportional to 2,601.72, 3,902.60 and 653.92

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Solution

The fourth proportional to 2,601.72, 3,902.60 and 653.92 is: 980.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,601.72 : 3,902.60 = 653.92 : x
  2. Step 2: Convert to fraction form
    2,601.72/3,902.60 = 653.92/x
  3. Step 3: Cross multiply
    2,601.72x = 3,902.60 × 653.92
  4. Step 4: Simplify right side
    2,601.72x = 2,551,988.19
  5. Step 5: Solve for x
    x = 2,551,988.19/2,601.72
  6. Step 6: Final answer
    x = 980.89

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.